Accelerometer-Determined Physical Activity and Mortality in a National Prospective Cohort Study: Considerations by Hearing Sensitivity

Background

Previous work demonstrates that hearing impairment and physical inactivity are associated with premature all-cause mortality. The purpose of this study was to discern whether increased physical activity among those with hearing impairment can produce survival benefits.

Method

Data from the 2003–2006 National Health and Nutrition Examination Survey were used, with follow-up through 2011. Physical activity was objectively measured over 7 days via accelerometry. Hearing sensitivity was objectively measured using a modified Hughson Westlake procedure.

Results

Among the 1,482 participants, 152 died during the follow-up period (10.26%, unweighted); the unweighted median follow-up period was 89 months (interquartile range = 74–98 months). For those with normal hearing and after adjustments, for every 60-min increase in physical activity, adults had a 19% (HR [Hazard Ratio] = 0.81; 95% confidence interval [CI] [0.48–1.35]; p = .40) reduced risk of all-cause mortality; however, this association was not statistically significant. In a similar manner, physical activity was not associated with all-cause mortality among those with mild hearing loss (HR = 0.76; 95% CI [0.51–1.13]; p = .17). However, after adjustments, and for every 60-min increase in physical activity for those with moderate or greater hearing loss, there was a 20% (HR = 0.20; 95% CI [0.67–0.95]; p = .01) reduced risk of all-cause mortality.

Conclusion

Physical activity may help to prolong survival among those with greater hearing impairment.

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